The goal of this software is to automatically generate C/C++ code which reads and writes GOOSE and Sampled Value packets. Any valid IEC 61850 Substation Configuration Description (SCD) file, describing GOOSE and/or SV communications, can be used as the input. The output code is lightweight and platform-independent, so it can run on a variety of devices, including low-cost microcontrollers. It\'s ideal for rapid-prototyping new protection and control systems that require communications. This mbed project is a simple example of this functionality. Other code: https://github.com/stevenblair/rapid61850 Project homepage: http://personal.strath.ac.uk/steven.m.blair/
encodePacket.c
- Committer:
- sblair
- Date:
- 2011-10-07
- Revision:
- 1:9399d44c2b1a
- Parent:
- 0:230c10b228ea
File content as of revision 1:9399d44c2b1a:
/** * Rapid-prototyping protection schemes with IEC 61850 * * Copyright (c) 2011 Steven Blair * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include "encodePacket.h" #include "svEncodeBasic.h" int getLengthBytes(int len) { if (len <= 126) { return 1; } else if (len <= 255) { return 2; } else { return 3; } } int encodeLength(unsigned char *buf, CTYPE_INT16U len) { if (len <= 126) { buf[0] = (unsigned char) len; return 1; } else if (len <= 255) { buf[0] = (unsigned char) 0x81; // 0x80 specifies larger than one byte; 0x02 is number of length bytes to follow buf[1] = (unsigned char) len; return 2; } else { // assume length is not greater than 2^15 buf[0] = (unsigned char) 0x82; // 0x80 specifies larger than one byte; 0x02 is number of length bytes to follow ENCODE_CTYPE_INT16U(&buf[1], &len); return 3; } }